Vacuum switching tube made of ceramic

A vacuum switching tube is a type of circuit breaker in electrical power engineering, in which the contacts are located to reduce the unwanted switching arc under vacuum. These switches are preferably used in medium-voltage switchgear with voltages up to approx. 40 kV.

Alumina Systems builds frontal metallized aluminium oxide ceramic tubes which our customers connect to the metal components to form vacuum-tight vacuum interrupters by brazing. Alumina Systems has been successfully manufacturing metallized alumina ceramic tubes for vacuum switches from 20 mm to 305 mm diameter since 1970.